Simultaneously Stabilizing Both Electrodes and Electrolytes by a Self‐Separating Organometallics Interface for High‐Performance Zinc‐Ion Batteries at Wide Temperatures

Zhao, Ming; Lv, Yanqun; Zhao, Shunshun; Xiao, Ying; Niu, Jin; Yang, Qi; Qiu, Jieshan; Wang, Rui; Chen, Shimou

doi:10.1002/adma.202206239

Cited by 89 publications

(47 citation statements)

References 63 publications

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“…In the BE electrolyte, the Zn dendrite grows quickly (Figure 4d). However, in the PE 375 electrolyte, the Zn deposition layer presents a uniform and dense morphology (Figure 4e), [28] and no uneven deposition occurs after 60 min, which indicates that PE 375 achieves the uniform distribution of Zn 2 + at the surface of Zn anode, and thus inhibits dendrite growth.…”

Section: Resultsmentioning

confidence: 98%

High‐Performance Zinc‐Ion Battery Enabled by Tuning the Terminal Group and Chain Length of PEO‐based Oligomers

Zhao

Xiao

et al. 2023

Batteries & Supercaps

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Side reactions and dendrite growth issues originated from free water seriously hamper the application of zinc‐ion batteries (ZIB). The electrolyte strategy of using a co‐solvent system has been proven to effectively improve the performance of ZIB. However, lack of thorough understanding of the co‐solvent structure on the performance of electrolytes hinders the rational design of co‐solvent electrolytes. Here, by studying how the terminal group and chain length of polyethylene oxide (PEO) based oligomers affect the electrochemical performance of ZIB, we obtained the optimized PEO oligomer structure and the underlying mechanism. As a result, the designed co‐solvent electrolyte enables the Zn|| NH4V4O10 full cell to gain a 98.5 % capacity retention over 9500 cycles at 10 A g−1. This work provides new insights into the inhibition of water‐related side reactions and further promote the development of electrolytes for ZIB and other metal batteries.

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Section: Resultsmentioning

confidence: 98%

High‐Performance Zinc‐Ion Battery Enabled by Tuning the Terminal Group and Chain Length of PEO‐based Oligomers

Zhao

Xiao

et al. 2023

Batteries & Supercaps

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“…Meanwhile, the positive charge can accelerate the de‐solvation of [Zn(H 2 O) 6 ] 2+ and provide nucleation sites for uniform Zn 2+ deposition. Switchable polarized materials, [ 9 ] NaCN‐PAN, [ 10 ] and poly‐zwitterionic ionic liquid coatings [ 11 ] additionally enable bifunctional regulation of the Zn anode. Multilayer amphiphilic charge layer can effectively stabilize the Zn anode; however, positive electric field severely hinders the diffusion of Zn 2+ to the anode, leading to an increase in cell polarization.…”

Section: Introductionmentioning

confidence: 99%

Periodically Alternating Electric Field Layers Induces the Preferential Growth of Zn (002) Plane for Ultralow Overpotential Zinc‐Ion Batteries

Feng

Cui

et al. 2023

Advanced Energy Materials

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However, the commercialization of ZIB was hindered by the low coulombic efficiency (CE) and fast failure of zinc metal anodes caused by uncontrolled dendrite growth, continuous hydrogen evolution reaction (HER), and insulating by-product resulting from electrolyte decomposition (Figure S1, Supporting Information). [3] Currently, much research has focused on tuning the local electric field to regulate Zn anodes. In addition, two strategies were mainly adopted (Scheme 1a). First, introduce negative electric field/negative charge groups to unify the electric field by adsorbing ions and homogenizing the ion flux. Pan et al. constructed an anionic MOF (ZSB) with a large number of sulfonate groups on the Zn anode to homogeneous Zn deposition. [4] In addition, many works also successfully built a negative electric field at the Zn anode such as SO 4 2− receptors, [5] CeO 2 , [6] and tetragonal KTa 0.54 Nb 0.46 O 3 [7] to effectively accelerate the ion flux and disperse Zn 2+ to inhibit the growth of dendrites. However, the negative electric field has less effect on water molecules, making it difficult to solve the problem of slow de-solvation, HER, and by-products. As a result, a multilayer electric field is designed to homogenize the Zn 2+ deposition and accelerate de-solvation. Chao et al. developed an amphiphilic charge silk fibroin (SF) coating. [8] The negative charge of the surface accelerates Zn 2+ transport and homogenizes ion flux. Meanwhile, the positive charge can accelerate the de-solvation of [Zn(H 2 O) 6 ] 2+ and provide nucleation sites for uniform Zn 2+ deposition. Switchable polarized materials, [9] NaCN-PAN, [10] and poly-zwitterionic ionic liquid coatings [11] additionally enable bifunctional regulation of the Zn anode. Multilayer amphiphilic charge layer can effectively stabilize the Zn anode; however, positive electric field severely hinders the diffusion of Zn 2+ to the anode, leading to an increase in cell polarization. Therefore, on the basis of effective desolvation, accelerating diffusion of Zn 2+ and homogenizing ion flux are expected to achieve a more stable Zn anode.Herein, we propose a general periodically alternating electric field layers strategy. Unlike the multilayer electric field, the periodically alternating electric field on nanoscale allows for effective de-solvation and uniform ion flux within the same layer of space (Scheme 1b). We demonstrate the laponite (LAP), a 2D silicate with typical charge separation properties,The sluggish de-solvation kinetics and uneven Zn 2+ transport behavior at the Zn anode are undesirable for commercialization of zinc ion batteries. To address these issues, a periodically alternating electric field is introduced on the Zn anode by constructing a laponite nano-clay layer with unique electric field separation properties. This layer exhibits negative and positive electric fields together in the same space but in different directions (negative electric field in the normal direction while the positive electric field is in the radial direction); thus, ac...

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“…To date, various interface protective layers, such as, montmorillonite, ZnF 2 , ZrO 2 , polyamide (PA), polyimide (PI), ferroelectric polymer, etc. [22][23][24][25][26][27][28] were explored as physical isolation protective layers to prolong the cycling life of Zn anode. Although these reported protective layers could inhibit the growth of Zn dendrites to some extent through regulation of electrolyte/electrode interface, it is still a challenge to achieve perfect artificial protective layer with fast migration kinetics of Zn 2+ .…”

Section: Introductionmentioning

confidence: 99%

Metal Oxide Aerogels: A New Horizon for Stabilizing Anodes in Rechargeable Zinc Metal Batteries

Shi

Chen

et al. 2023

Advanced Energy Materials

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Dendritic deposition and side reactions have been long‐standing interfacial challenges of Zn anode, which have prevented the development of practical aqueous zinc‐based batteries. Herein, an oxygen vacancy‐rich CeO2 aerogel (VAG‐Ce) interface layer that simultaneously integrates Zn2+ selectivity, porosity, and is lightweight is reported as a new strategy to achieve dendrite‐free and corrosion‐free Zn anodes. The well‐defined and uniform nanochannels of VAG‐Ce can act as ion sieves that redistribute Zn2+ at the Zn anode surface by regulating Zn2+ flux, leading to uniform Zn deposition and significantly suppressing dendrite growth. Importantly, the abundant oxygen vacancies exposed on VAG‐Ce surface can strongly capture SO42−, forming a negatively charged layer that can attract Zn2+ and accelerate the Zn2+ migration kinetics, while the subsequent repulsion of additional anions can effectively suppress the generation of (Zn4SO4(OH)6·xH2O) byproducts, thereby realizing very stable Zn anodes. Consequently, VAG‐Ce modified Zn anode (VAG‐Ce@Zn) enables a long‐term lifespan over 4000 h at 4 mA cm−2 and a record‐high cycle life of 1200 h is achieved under an ultrahigh 85% Zn utilization at 8 mA cm−2, which enables excellent capacity retention and cycling performance of VAG@Zn/MnO2 cells. This work contributes an innovative design concept by introducing oxygen vacancy‐rich aerogels and provides a new horizon for stabilizing Zn anode for large‐scale energy storage.

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Simultaneously Stabilizing Both Electrodes and Electrolytes by a Self‐Separating Organometallics Interface for High‐Performance Zinc‐Ion Batteries at Wide Temperatures

Cited by 89 publications

References 63 publications

High‐Performance Zinc‐Ion Battery Enabled by Tuning the Terminal Group and Chain Length of PEO‐based Oligomers

High‐Performance Zinc‐Ion Battery Enabled by Tuning the Terminal Group and Chain Length of PEO‐based Oligomers

Periodically Alternating Electric Field Layers Induces the Preferential Growth of Zn (002) Plane for Ultralow Overpotential Zinc‐Ion Batteries

Metal Oxide Aerogels: A New Horizon for Stabilizing Anodes in Rechargeable Zinc Metal Batteries

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